{
  "graph": null,
  "err": {
    "ioerr": null,
    "errs": [
      {
        "range": "d2/testdata/d2compiler/TestCompile/nested_edge.d2,0:0:0-2:1:39",
        "errmsg": "d2/testdata/d2compiler/TestCompile/nested_edge.d2:1:1: edges cannot be nested within another edge"
      }
    ]
  }
}